Upper Limits on O VI Emission from Voyager Observations

Details Upper Limits on O VI Emission from Voyager Observations Upper Limits on O VI Emission from Voyager Observations

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002japa...23...23m&link_type=abstract

Journal of Astrophysics and Astronomy, Vol. 23, p.23

Astronomy and Astrophysics

Astrophysics

Scientific paper

We have examined 426 Voyager fields distributed across the sky for O VI (1032/1038 Å) emission from the Galactic diffuse interstellar medium. No such emission was detected in any of our observed fields. Our most constraining limit was a 90% confidence upper limit of 2600 photons cm-2 sr-1 s-1 on the doublet emission in the direction (l, b) = (117.3, 50.6). Combining this with an absorption line measurement in nearly the same direction allows us to place an upper limit of 0.01 cm-3 on the electron density of the hot gas in this direction. We have placed 90% confidence upper limits of less than or equal to 10,000 photons cm-2 sr-1 s-1 on the O VI emission in 16 of our 426 observations.

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